Mike gets jealous when a business associate of Laura's appears to have more than business in mind. Helen takes over Mike's office work, but she proves too glamorous for the job.

One Sunday, Laura longs for an adventure, but one after another her schemes fall flat. Then Harry arrives and suggests they all go out to dinner - in France.

In the process of furnishing their new shared flat, Mike learns how little faith Laura has in their future together. As Mike and Laura reach a new low in their relationship, Phil and Helen arrive with good news.